With a sufficient quantity of alcohol, this bears a resemblance to the character in the Castaway movie.

You might think "Hey, won't the 3-d printed plastic melt from the heat?" You'd be exactly right. This unit will probably melt during testing. I hope to get some good data before it dies.

Here's what it should look like when finished.

... I wasn't sure how many cogs I'd need, but I think it's at least 4. 8 would be better. I put holes in for 16. Only one is shown here because it's a PITA to mate those in solidworks.

The magnets came in the mail today. Wish me luck!

Here's a brain teaser for you. Thermomagnetic motors have historically had terribly efficiency. This comes from a single common flaw. Can you figure out what it is? Email or comment if you think you've got it. Elizabeth.a.greene@gmail.com